This is a utility I'm working on to make configuring i3 and other programs that use X11's sometimes counterintuitive keysym names a little easier. It was inspired by the time and effort I spent figuring out that when you press printscreen with alt held down, this generates a Sys_Req key event as opposed to a Print key event - if there are other similar peculiarities awaiting me in the keymap, I would rather handle them programmatically instead of having to manually learn them all, and I would like to sharpen my C skills up anyway.